Critical Loads Calculator

This calculator determines the estimated total wattage requirements to prevent or minimize nuisance power trip events during a power outage, and then recommends the optimum battery size to meet those requirements. Nuisance power tripping occurs when instantaneous power demand exceeds the peak power output capabilities of the energy storage system. A critical loads system will not be able to provide or sustain all the power needs of your home during a power outage, so it is necessary to plan for the amount of energy that is absolutely necessary during these critical events.

Select the items that are most critical to keep powered when a power outage occurs.In the "Critical Load Items" table below:

Choose a category in the first column (“Category”).

Choose an critical item in the second column (“Item”).

Enter a quantity in the “Quantity” column, if you will be powering more than 1 of the chosen item.

The following values will be calculated:

Starting Watts. This is the initial power (“surge”) that devices with inductive motors draw when first powered on. For example, a refrigerator will switch its compressor on and off continuously to maintain temperature.

Running Watts. This is the average sustained power that an electrical load uses while operating.

If you do not find a specific item in the Group/Item lists in the provided table, you can enter your own custom item in any of the last five rows.

Enter the item name in the "Item" column.

Enter a quantity in the “Quantity” column.

As you enter your critical items, the calculator will total the Starting and Running Watts for all of the items in each column ("Totals" row), and then compare these totals against the available wattage for each battery size. If the larger of the two totals is less than the watts provided by the battery, the color of the value will remain GREEN. If the total exceeds the available watts provided by the battery, the color of the value will change to GRAY.

The first battery size from the left in green is the minimum size required to meet your critical load requirements. If all of the battery sizes are gray, you will need to remove some of the critical items from the table (change the quantity to 0).

Battery Size (kWh)

6.4 kWh

9.6 kWh

12.8 kWh

16.0 kWh

19.2 kWh

Eguana Techologies

3200 W Avail.

4800 W Avail.

5000 W Avail.

5000 W Avail.

5000 W Avail.

Critical Load Items

Category

Item

Quantity

StartingWatts

RunningWatts

Use the rows to the right to add household electrical items with custom Starting and Running Watt values.

Totals

The values above are estimates, and serve as guidelines only.Always check your electrical item for exact wattage requirements.Refer to the data plate or owner’s manual of each item.